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Trans-Neptunian object

2003 QP91

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(2003 QP91)

Where is it now

Distance from Sun
39.872 AU
True anomaly
158.97°
Distance from Earth
38.875 AU
As of
15 October 2026

Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.

Sun Earth — 0.997 AU from the Sun Earth 2003 QP91 — 39.872 AU from the Sun 2003 QP91
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2003 QP91 is 38.875 AU from Earth today (5.4 light-hours).

In the sky

Right ascension
01h 23m 42s
Declination
+08° 16′ 20″
Constellation
Pisces
Distance from Earth
38.88 AU
Elongation from the Sun
179.24° — near opposition — up most of the night

Visible from both hemispheres.

From your location

See how high it is right now, whether it is up after civil twilight, and when it rises and sets where you are.

How do I find my coordinates?

Google Maps on a computer

  1. Right-click the spot where you'll be observing.
  2. The first line of the menu is the coordinates, e.g. 51.50722, -0.12758 — click it and they're copied.
  3. Paste them above.

Google Maps on a phone

  1. Press and hold the spot to drop a pin.
  2. The coordinates appear in the search bar (or on the pin's card) — tap to copy, then paste above.

A full Google Maps link works too, but the short maps.app.goo.gl share links don't carry coordinates — copy the numbers instead. We round to about a kilometre; that's all the sky calculation needs.

Know your what3words address? Paste it, e.g. ///filled.count.soap. This is optional — the three words are sent to what3words to convert them, and we don't store the address or the result.

Your location stays in your browser and is sent only for this calculation. Using a what3words address is optional; if you do, the three words go to what3words to be converted and we don't record them. Set a location first, then you can save an email alert for this object. See our privacy policy.

Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.

Orbital elements

Semi-major axis
36.52 AU
Eccentricity
0.0999
Inclination
6.55°
Orbital period
220.7 years
Perihelion
32.874 AU
Aphelion
40.167 AU
Longitude of ascending node
26.62°
Argument of periapsis
196.83°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 12,401.4 LD
31.866 AU
Tisserand (Jupiter)
5.38

Orbit quality

Orbit reasonably well determined (uncertainty code 3).

Observations used
32
Data arc
16.19 years
First observed
23 August 2003
Last observed
1 November 2019
Residual RMS
0.2 ″
Solution · Otto Matic
18 December 2023

Visual & observation

Absolute magnitude (H)
7.55

Discovery & classification

Also known as 2013 RW155

TNO

Sources